[Transoral approach to the ventral surface of the brain stem for the removal of a clivus chordoma (author's transl)].
D000328:Adult; D001932:Brain Neoplasms / Q000601:surgery*; D001933:Brain Stem / Q000601:surgery*; D002817:Chordoma / Q000601:surgery*; D006801:Humans; D008297:Male; D008722:Methods